I don't know about your playtime of this game but if you pay attention while playing the game, you can begin to see some empty spaces that feels like something should be there but cut from the game at some point during development.
Besides gym content, there is also infirmary, for example. When trying to enter infirmary, Karryn just says something similar to: "I don't think I should be going there". I don't think this is their "design plan" at all.
There's also the fact that floors 4 and 5 have nothing in them besides a few enemies. No sidejobs, no edicts, no mechanics, nothing special, just a few enemies in a few corridors. But hey, if I remember correctly, they atleast have yetis and wolfs as new enemies there. So that's something I guess.